Function loadSymbol

src/mapboxgl/overlay/symbol/MapExtendSymbol.js:350–359

* 加载单个Web符号 * @param {string} id * @param {Mapboxgl.Map} map * @returns {object} symbol对象

(id, map)

   * @returns {object} symbol对象
   */
  function loadSymbol(id, map) {
    return getSymbol(id, map).then((symbolResult) => {
      if (!symbolResult) {
        return null;
      }
      const { value, image } = symbolResult;
      image && getSymbolHandler(map).addSymbolImageToMap(value, image);
      return value;
    })
  }
}
export default MapExtendSymbol